Dual-Mode Noninverting DC-DC Buck Converter for Wearable AMOLED Display
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This paper proposes a highly integrated dualmode noninverting DC-DC buck converter for wearable AMOLED display panels. The DC-DC buck converter is designed to increase power efficiency under light load using PWM-SPWM (set-time variable pulse width modulation) dualmode. The major role of the PWM-SPWM controller is to switch frequency according to the load current by changing only the set signal using the VCO (voltage controlled oscillator) in the conventional PWM control signal. The converter generates variable output voltages by changing reference voltage of error amplifier. The proposed circuit has been designed using a 0.35 𝝁m standard CMOS process and its core area of 1.2 mm x 1.3 mm. The measurement results show that the proposed circuit has power efficiency of 65% ~ 75% with output voltage of 2.0 V ~ 2.7 V for a load current range of 5 mA ~ 50 mA and input voltage 3.3 V ~ 4.2 V.
Abstract
This paper proposes a highly integrated dualmode noninverting DC-DC buck converter for wearable AMOLED display panels. The DC-DC buck converter is designed to increase power efficiency under light load using PWM-SPWM (set-time variable pulse width modulation) dualmode. The major role of the PWM-SPWM controller is to switch frequency according to the load current by changing only the set signal using the VCO (voltage controlled oscillator) in the conventional PWM control signal. The converter generates variable output voltages by changing reference voltage of error amplifier. The proposed circuit has been designed using a 0.35 𝝁m standard CMOS process and its core area of 1.2 mm x 1.3 mm. The measurement results show that the proposed circuit has power efficiency of 65% ~ 75% with output voltage of 2.0 V ~ 2.7 V for a load current range of 5 mA ~ 50 mA and input voltage 3.3 V ~ 4.2 V.
참고문헌 (8)
- H. S. Jeon, "Power semiconductor market and technology development trends", Trend Analysis of Electronic Communications, 28(6), pp.206~216 (2013)
- G. A. Rincon-Mora, "A low voltage, dynamic, noninverting, synchronous buck-boost converter for portable applications", IEEE Trans. Power Electronics, 19(2), pp.443~452 (2004)
- 남기수, "A Highly Power-Efficient Single-Inductor Multiple-Outputs (SIMO) DC-DC Converter with Gate Charge Sharing Method", JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 14(5), pp.549~556 (2014), 대한전자공학회
- Chung Hwan Son, "A 82.5% Power Efficiency at 1.2 mW Buck Converter with Sleep Control", JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE, 16(6), pp.842~846 (2016), 대한전자공학회
- C. Shi, "A Highly Integrated Power Management IC for Advanced Mobile Applications", IEEE Journal of Solid-State Circuits, 42(8), pp.1723~1731 (2007)
- J. Xiao, "A 4-μA quiescent-current dual-mode digitally controlled buck converter IC for cellular phone applications", IEEE Journal of Solid-State Circuits, 39(12), pp.2342~2348 (2004)
- W. R. Liou, "A high efficiency dual-mode buck converter IC for portable applications", IEEE Transactions on Power Electronics, 23(2), pp.667~677 (2008)
- S. Hong, "Inverting buck-boost DC-DC converter for mobile AMOLED display with real-time self-tuned minimum power-loss tracking scheme", proc. of IEEE Custom Integrated Circuits Conference, pp.1~4 (2014)